While Zweihander material is usually high quality, this chapbook is phoned in.
The author(s) research is terrible; for just one glareing example, for a work set in 1876 the book focuses heavily on flintlocks, which had been out of mainstream use for 40+ years, ignores percussion systems entirely, lists several rare or non-existant weapons (the 20-year-old Volcanic arms system, of which only 2000 were made, for example), and then, for the golden era of the fixed-cartridge revolver, gives the player a single generic 'revolver' entry.
The entire period setting material is of like quality: superficial at best, factually wrong at worst. The famous Zweihander focus on historical tone is glaringly absent from this work.
It reads like someone's homebrew conversion notes, and feels like Red Death Redemption was used as the sole research material.